fix nas in python3 (#21)

* fix py3

* fix

paddleslim/common/sa_controller.py

@@ -137,7 +137,7 @@ class SAController(EvolutionaryController):
             _logger.debug("change index[{}] from {} to {}".format(
                 index, tokens[index], new_tokens[index]))
 
-            if self._searched.has_key(str(new_tokens)):
+            if str(new_tokens) in self._searched.keys():
                 _logger.debug('get next tokens including searched tokens: {}'.
                               format(new_tokens))
                 continue

paddleslim/nas/sa_nas.py

@@ -93,7 +93,7 @@ class SANAS(object):
                 premax_reward = scene['_max_reward']
                 prebest_tokens = scene['_best_tokens']
                 preiter = scene['_iter']
-                psearched = screen['_searched']
+                psearched = scene['_searched']
             else:
                 preinit_tokens = init_tokens
                 prereward = -1
@@ -114,7 +114,7 @@ class SANAS(object):
                 best_tokens=prebest_tokens,
                 constrain_func=None,
                 checkpoints=save_checkpoint,
-                searched = psearched)
+                searched=psearched)
 
             max_client_num = 100
             self._controller_server = ControllerServer(